Recover from missing arguments in new expression.

pkg/front_end/lib/src/fasta/kernel/body_builder.dart

Index: pkg/front_end/lib/src/fasta/kernel/body_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
index a06884ee7e279942d48cc930de0ac85fbff6a4ca..e906a1903e792d17c02003c4e04c78c0ae048636 100644
--- a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
@@ -1652,6 +1652,11 @@ class BodyBuilder extends ScopeListener<JumpTarget> implements BuilderHelper {
     List<DartType> typeArguments = pop();
     var type = pop();
 
+    if (arguments == null) {
+      push(buildCompileTimeError("No arguments.", token.charOffset));
+      return;
+    }
+
     if (typeArguments != null) {
       assert(arguments.types.isEmpty);
       arguments.types.addAll(typeArguments);